Chemistry 9 Chapter 3Periodic Table and Periodicity of Properties - 12

Chemistry 9 Chapter 3
Periodic Table and Periodicity of Properties - 12

1. Electron affinity increases across a period because?

a) Nuclear charge increases
b) None of these
c) Atomic radius decreases
d) Both of these

2. Which one of the following has the lowest electron affinity?

a) Alkali metals
b) Halogens
c) None of these
d) Noble gases

3. Moving from top to bottom in a group, the electron affinity?

a) Remains constant
b) Decreases
c) Increases

4. The decrease in the electron affinity across a period is due to?

a) Increase in shielding effect
b) Decrease in shielding effect
c) All of these
d) Decrease in ionization energy

5. The ability of an atom to attract the electrons towards itself in a chemical bond is known as?

a) Electron affinity
b) Electronegativity
c) Ionization energy
d) Activation energy

6. Who devised a method for calculating relative electronegativities of elements?

a) Pauling
b) Aristotle
c) Rutherford
d) Bohr

7. Linus Pauling was?

a) American chemist
b) Arab biologist
c) British chemist
d) Pakistani physician

8. Which one of the following has the highest electronagativity?

a) Be
b) Ca
c) Sr
d) Mg

9. Which one of the following has the highest electronegativity?

a) Br
b) F
c) I
d) Cl

10. Which one of the following has the lowest electronegativity?

a) O
b) N
c) B
d) C

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